Originally posted by HandyAndyWell done...you really are a fast poster 😉
Foul ball, assuming no one touched it while it was in fair territory. Even though the ball hit the mound, which is in fair territory, it bounced into foul ground (the dugout) before passing first or third base. When you say "spins backwards," I assume you mean while in the air. If it spins on the ground behind home plate, it is foul no matter what happens after that.